Mica or her Aunt Mary can help you with ordering the correct Filter, as that's something that isn't necessarily sold individually through the Store. As such, I'm guessing they probably won't post pricing info up here, but would gladly discuss it with you over the phone. I'll also guarantee you will learn other stuff during that conversation, as it's an entirely different experience talking to people who actually built the instrument, and know *exactly* what you need.
I have repaired some poly finishes with CA glue, and was tempted to try it on a similar dink in my Persuader... just never did. I've since gotten used to it, as just another defining feature of *my* bass.